Purchased the 5502M Pellet Stove at Tractor Supply in November. It ran fine twice, now we have error 2. We set it up with a 3 inch pipe as installation instructions. Then we have an adapter from 3 inch to a 8 inch pipe that goes up the brick chimney. This pipe was used for a wood burning stove. I called US Stove and they told me that I need to run a 4 inch pipe up the 8 inch pipe so the backdraft will be correct. How do you install this pipe? Will it correct the problem?